package com.kexilo.system.management.controller.monitor;

import com.kexilo.core.common.annotation.Log;
import com.kexilo.core.common.core.web.BaseController;
import com.kexilo.core.common.core.web.domain.R;
import com.kexilo.core.common.enums.BusinessType;
import com.kexilo.core.shared.cache.CacheMonitor;
// TODO: 将在cache插件完善后重构
// import com.kexilo.core.shared.cache.CacheRefreshScheduler;
// import com.kexilo.core.shared.cache.CacheVersionManager;
// import com.kexilo.core.shared.cache.CacheWarmupService;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.CacheManager;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

/**
 * 缓存管理控制器
 * 提供缓存监控、管理和优化功能
 * 
 * @author Kexilo
 */
@RestController
@RequestMapping("/monitor/cache")
@Tag(name = "缓存管理", description = "缓存监控、管理和优化接口")
public class CacheManagementController extends BaseController {
    
    private static final Logger log = LoggerFactory.getLogger(CacheManagementController.class);
    
    @Autowired
    private CacheManager cacheManager;
    
    @Autowired
    private CacheMonitor cacheMonitor;
    
    // TODO: 将在cache插件完善后重构
    // @Autowired
    // private CacheRefreshScheduler refreshScheduler;
    
    // @Autowired
    // private CacheVersionManager versionManager;
    
    // @Autowired
    // private CacheWarmupService warmupService;
    
    /**
     * 获取缓存性能报告
     */
    @GetMapping("/performance")
    @Operation(summary = "获取缓存性能报告", description = "获取所有缓存的性能统计信息")
    @PreAuthorize("@ss.hasPermi('monitor:cache:query')")
    public R<Map<String, CacheMonitor.CacheStatistics>> getCachePerformance() {
        Map<String, CacheMonitor.CacheStatistics> report = cacheMonitor.getCachePerformanceReport();
        return R.ok(report);
    }
    
    /**
     * 获取缓存刷新统计信息
     */
    @GetMapping("/refresh/stats")
    @Operation(summary = "获取缓存刷新统计", description = "获取缓存刷新任务的统计信息")
    @PreAuthorize("@ss.hasPermi('monitor:cache:query')")
    public R<Object> getRefreshStats() {
        // TODO: 将在cache插件完善后重构
        log.warn("缓存刷新统计功能正在重构中，请等待cache插件完善");
        return R.fail("缓存刷新统计功能正在重构中，请使用基础缓存监控功能");
    }
    
    /**
     * 获取缓存版本统计信息 (暂时禁用 - 等待cache插件完善)
     */
    /*
    @GetMapping("/version/stats/{cacheGroup}")
    @Operation(summary = "获取缓存版本统计", description = "获取指定缓存组的版本统计信息")
    @PreAuthorize("@ss.hasPermi('monitor:cache:query')")
    public R<CacheVersionManager.CacheGroupStats> getCacheVersionStats(
            @Parameter(description = "缓存组名", example = "user")
            @PathVariable String cacheGroup) {
        CacheVersionManager.CacheGroupStats stats = versionManager.getCacheGroupStats(cacheGroup);
        return R.ok(stats);
    }
    */
    
    /**
     * 清理指定缓存
     */
    @DeleteMapping("/evict/{cacheName}")
    @Operation(summary = "清理指定缓存", description = "清理指定名称的缓存")
    @PreAuthorize("@ss.hasPermi('monitor:cache:remove')")
    @Log(title = "缓存管理", businessType = BusinessType.DELETE)
    public R<Void> evictCache(
            @Parameter(description = "缓存名称", example = "user:info")
            @PathVariable String cacheName) {
        try {
            cacheMonitor.evictCache(cacheName);
            return R.ok("缓存清理成功");
        } catch (Exception e) {
            log.error("清理缓存[{}]失败", cacheName, e);
            return R.fail("清理缓存失败: " + e.getMessage());
        }
    }
    
    /**
     * 清理所有缓存
     */
    @DeleteMapping("/evict/all")
    @Operation(summary = "清理所有缓存", description = "清理系统中的所有缓存")
    @PreAuthorize("@ss.hasPermi('monitor:cache:remove')")
    @Log(title = "缓存管理", businessType = BusinessType.DELETE)
    public R<Void> evictAllCaches() {
        try {
            cacheMonitor.evictAllCaches();
            return R.ok("所有缓存清理成功");
        } catch (Exception e) {
            log.error("清理所有缓存失败", e);
            return R.fail("清理所有缓存失败: " + e.getMessage());
        }
    }
    
    /**
     * 批量失效缓存组 (暂时禁用 - 等待cache插件完善)
     */
    /*
    @DeleteMapping("/evict/groups")
    @Operation(summary = "批量失效缓存组", description = "通过版本控制批量失效多个缓存组")
    @PreAuthorize("@ss.hasPermi('monitor:cache:remove')")
    @Log(title = "缓存管理", businessType = BusinessType.DELETE)
    public R<Void> batchEvictCacheGroups(@RequestBody String[] cacheGroups) {
        try {
            versionManager.batchEvictCacheGroups(cacheGroups);
            return R.ok("缓存组批量失效成功");
        } catch (Exception e) {
            log.error("批量失效缓存组失败", e);
            return R.fail("批量失效缓存组失败: " + e.getMessage());
        }
    }
    */
    
    /**
     * 手动刷新所有缓存
     */
    @PostMapping("/refresh/all")
    @Operation(summary = "手动刷新所有缓存", description = "手动触发所有缓存的刷新任务")
    @PreAuthorize("@ss.hasPermi('monitor:cache:edit')")
    @Log(title = "缓存管理", businessType = BusinessType.UPDATE)
    public R<Void> refreshAllCaches() {
        try {
            // TODO: 将在cache插件完善后重构
            // refreshScheduler.refreshAllCaches();
            log.warn("缓存刷新功能正在重构中，请等待cache插件完善");
            
            // 临时实现：清除所有缓存，让其自然重载
            cacheManager.getCacheNames().forEach(cacheName -> {
                var cache = cacheManager.getCache(cacheName);
                if (cache != null) {
                    cache.clear();
                }
            });
            
            return R.ok("缓存已清空，将在下次访问时重新加载");
        } catch (Exception e) {
            log.error("手动刷新所有缓存失败", e);
            return R.fail("刷新缓存失败: " + e.getMessage());
        }
    }
    
    /**
     * 执行缓存预热
     */
    @PostMapping("/warmup")
    @Operation(summary = "执行缓存预热", description = "手动触发缓存预热任务")
    @PreAuthorize("@ss.hasPermi('monitor:cache:edit')")
    @Log(title = "缓存管理", businessType = BusinessType.OTHER)
    public R<Void> warmupCaches() {
        try {
            // TODO: 将在cache插件完善后重构
            // 异步执行预热任务
            // warmupService.warmupDictData();
            // warmupService.warmupSystemConfig();
            // warmupService.warmupMenuData();
            // warmupService.warmupDeptData();
            
            log.warn("缓存预热功能正在重构中，请等待cache插件完善");
            return R.fail("缓存预热功能正在重构中，请等待cache插件完善");
        } catch (Exception e) {
            log.error("执行缓存预热失败", e);
            return R.fail("缓存预热失败: " + e.getMessage());
        }
    }
    
    /**
     * 检查缓存预热状态
     */
    @GetMapping("/warmup/status")
    @Operation(summary = "检查缓存预热状态", description = "检查缓存预热任务是否完成")
    @PreAuthorize("@ss.hasPermi('monitor:cache:query')")
    public R<Boolean> checkWarmupStatus() {
        // TODO: 将在cache插件完善后重构
        // boolean isCompleted = warmupService.isWarmupCompleted();
        log.warn("缓存预热状态检查功能正在重构中，请等待cache插件完善");
        return R.fail("缓存预热状态检查功能正在重构中", false);
    }
    
    /**
     * 获取缓存列表
     */
    @GetMapping("/list")
    @Operation(summary = "获取缓存列表", description = "获取系统中所有缓存的名称列表")
    @PreAuthorize("@ss.hasPermi('monitor:cache:query')")
    public R<java.util.Collection<String>> getCacheNames() {
        java.util.Collection<String> cacheNames = cacheManager.getCacheNames();
        return R.ok(cacheNames);
    }
    
    /**
     * 递增缓存版本号 (暂时禁用 - 等待cache插件完善)
     */
    /*
    @PostMapping("/version/increment/{cacheGroup}")
    @Operation(summary = "递增缓存版本号", description = "递增指定缓存组的版本号，实现批量失效")
    @PreAuthorize("@ss.hasPermi('monitor:cache:edit')")
    @Log(title = "缓存管理", businessType = BusinessType.UPDATE)
    public R<Long> incrementCacheVersion(
            @Parameter(description = "缓存组名", example = "user")
            @PathVariable String cacheGroup) {
        try {
            Long newVersion = versionManager.incrementCacheVersion(cacheGroup);
            return R.ok("缓存版本号已递增至: " + newVersion, newVersion);
        } catch (Exception e) {
            log.error("递增缓存版本号失败", e);
            return R.fail("递增缓存版本号失败: " + e.getMessage());
        }
    }
    */
    
    /**
     * 清理旧版本缓存 (暂时禁用 - 等待cache插件完善)
     */
    /*
    @DeleteMapping("/version/cleanup/{cacheGroup}")
    @Operation(summary = "清理旧版本缓存", description = "清理指定缓存组的旧版本数据")
    @PreAuthorize("@ss.hasPermi('monitor:cache:remove')")
    @Log(title = "缓存管理", businessType = BusinessType.DELETE)
    public R<Void> cleanupOldVersions(
            @Parameter(description = "缓存组名", example = "user")
            @PathVariable String cacheGroup) {
        try {
            versionManager.evictOldVersions(cacheGroup);
            return R.ok("旧版本缓存清理成功");
        } catch (Exception e) {
            log.error("清理旧版本缓存失败", e);
            return R.fail("清理旧版本缓存失败: " + e.getMessage());
        }
    }
    */
}
